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Chapter 6 – Network Servers 6. 1. 1 Client/Server Relationships| | 1. | What is a server? | A host running a software application that provides info or services to other hosts connected to the network. | | 2. | What factor is crucial to enabling complex interactions? | They all use agreed standards and protocols | | 3. | What is a client? | Name given used a device that is running web client software | | 4. | What is the key characteristic of client/server systems? | Client sends a request to a server and the server responds by carrying out a function. | | 5. What is the most commonly used instance of a client/server system? | Combination of a web browser and web server | 6. 1. 1. 4 Activity| 6. 1. 2 Role of Protocols in Client/Server Communication| | 6. |

What does HTTP define? | Hypertext transfer protocol It uses a method to transfer or convey info on the world wide web | | 7. | What is the transport protocol that manages the individual conversations between web servers and web clients? | TCP transmission control protocol | | 8. | What else does TCP provide? | It provides flow control and acknowledgement of packets exchanged bw host | | 9. What is the most common internetwork protocol? | Internet protocol IP | | 10. | What is IP responsible for? | Taking the formatted segments from TCP, assigning the the local addressing, and encapsulating them into packets 4 routing to destination host | | 11. | What governs how the bits are represented on the media, how the signals are sent over the media, and how they are interpreted by the receiving hosts? |

The standards and protocols | 6. 1. 3 TCP and UDP Transport Protocols| | 12. | What are the two most common transport protocols? | TCP(transmission control protocol) and UDP(user datagram protocol)| | 13. What protocol is used when an application requires acknowledgment that a message is delivered? | TCP | | 14. | What type of system is UDP? | Best effort delivery | 6. 1. 3. 4 Activity| 6. 1. 4 TCP/IP Port Numbers| | 15. | What is a port? | Numeric identifier within each segment that is used to keep track of specific conversations and destination services requested | | 16. | What is the port number for HTTP services? | Port 80 | | 17. | What is the port number for FTP services? | Port 21 | | 18. | How is the source port identified? | By a conversation bw 2 devices| | 19. | What is a socket? Combination of the source and destination ip address | | 20. | What is the purpose of the socket? | used to identify the server and service being request by the client| 6. 2. 1 Domain Name Service (DNS)| | 21. |

What does a DNS server do? | Provides a way for hosts to use this name to request the IP address of a specific server| | 22. | What is the port number for DNS services? | 53 | 6. 2. 1. 3 Lab Activity| 6. 2. 2 Web Client and Servers| | 23. | What is the most commonly used markup language? | Hypertext Make up Language (HTML)| | 24. | Is HTTP a secure protocol? | No | | 25. | Where are requests for secure HTTP sent? Sent to port 443| 6. 2. 2. 2 Packet Tracer Activity| 6. 2. 3 FTP Clients and Servers| | 26. | What does FTP do? | Provides an easy method to transfer files 4rm one compute to another. | | 27. | What port numbers are associated with FTP? | Port 21 and port 20 | 6. 2. 3. 2 GUI FTP Client| 6. 2. 3. 3 Lab Activity| 6. 2. 4 Email Clients and Servers| | 28. | What is one of the most popular client/server applications on the Internet? | Email | | 29. | What are some of the protocols used in processing email? | | | 30. | What is SMTP used for? | Used by an email client to send messages to its local email server. | 31. |

What port number is associated with SMTP requests? | Port 25 | | 32. | What does SMTP stand for? | Simple mail transfer protocol | | 33. | What does the acronym POP stand for? | Post office protocol | | 34. | What port number is associated with POP3? | Port 110 | | 35. | What is POP3 used for? | The client connects to the email server; the messages are downloaded to the client. | | 36. | What is SMTP used for? | Used by an email client to send messaged to its local email server| | 37. | What port number is associated with IMAP? | Port 143| | 38. | What is the difference between POP3 and IMAP4? | | 6. . 4. 4 Lab Activity| 6. 2. 5 IM Clients and Servers| | 39. | What is one of the most popular communication tools today? | IM (instant messaging) | | 40. | Can you transfer video, music, and speech files using IM? | Yes | 6. 2.

6 Voice Clients and Servers| | 41. | What is IP telephony? | Client that uses peer-to-peer technology similar to that used by IM. | | 42. | How do you get started using Internet telephone? | Download the client software 4rm one of the companies that provide the service. | 6. 2. 7 Port Numbers| | 43. | How many ports are available? | 1-1023| | 44. | What are the three categories of ports? Well-known, registered, and private ports. | | 45. | Who assigns and manages ports? | | | 46. | What are well-known ports? | Destination ports that are associated with common network applications| | 47. | What is the range of port numbers for well-known ports? | | | 48. | What port is assigned for Telnet? | | 6. 2. 7. 2 Activity| 6. 3. 1 Protocol Interaction| | 49. | What does successful communication between hosts require? | Interaction bw a numbers of protocols. | | 50. | What is a protocol stack? | Interaction bw protocols | | 51. | What are the benefits of a layered model? | 1.

Assist protocol design 2. Fosters competition 3. Prevents technology or capability changes in one layer 4rm affecting other layers above and below 4. Provides a common language to describe networking functions and capabilities | | 52. | What are the layers of the TCP/IP model? | | | 53. | Which layer of the TCP/IP model is responsible for end-to-end delivery services? | | | 54. | Where is error checking information found? | | 6. 3. 2. 3 Activity| 6. 3. 3 Open Systems Interconnect Model| | 55. | Who developed the OSI model? | International organization for standardization (ISO) | | 56. When was the OSI model developed? | 1984 | | 57. | How many layers are there in the OSI model? | 7| | 58. | What are the layers of the OSI model? | Application, presentation, session, transport, network, data link, physical. | | 59. | What is an acronym for helping to remember the OSI layer? | All People Seem To Need Data Processing| | 60. | Which layer encrypts and decrypts data and compresses and decompresses data? | Presentation| | 61. | Which layer detects and corrects frame transmit errors? | Data link| 6. 3. 3. 3 Activity | 6. 3. 3. 4 Activity | 6. 3. 3. 5 Packet Tracer Activity| 6. 5. 1. 1 Chapter Quiz|

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